Machine for separating gold



No. 608,84I. Patented Aug. 9, I898. W. A. DARLING. MACHINE FORSEPARATING GOLD.

(Appl at fildA g 18 1897) 2 Sheets8heet I.

(No Model.)

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No. 608,84l. Patented Aug. 9, I893.

W. A. DARLING.

MACHINE FOR SEPABATING GOLD.

(Application filed Aug. 18, 1897.) (No Model.) 2 Sheets-8heet 2.

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THE NORRIS Pzrsns cu. momumm WASHINGTON, n. c.

UNITE WILLIAM A. DARLING,

or GONDON, OREGON.

MACHINE FOR SEPARATING GOLD.

SPECIFICATION forming part of Letters Patent No. 608,841, dated August9, 1898. Application filed August 18, 1897. Serial No. 648,658. (Nomodel.)

To all whom it may concern:

Be it known that LWILLIAM A. DARLING, of Oondon, in the county ofGilliam and State of Oregon, have invented certain new and usefulImprovements in Machines for Separating Gold; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to gold-separators; and it consists,essentially,of an inclined pan box with a series of pans arrangedtherein and having mechanism attached thereto for imparting alongitudinal and transverse reciprocatory as well as a swinging action,

which becomes so rapid as to move the goldbearing material being treatedthereby in a rotary manner and similar to the motion imparted to pans inordinary placer-mining.

.The invention further consists of the details of construction andarrangement of the several parts, which will be more fully hereinafterdescribed and claimed.

The object of the invention is to provide a machine for use inlocalities where water is scarce and not requiring its use to any greatextent, if at all, and when used only requiring a sufficient amount toproduce a thorough separation of the gold from the material bearing thesame. I

In the accompanying drawings, Figure l is a perspective view of amachine embodying the invention. Fig. 2 is a longitudinal verticalsection on the line m :0, Fig. 1. Fig. 3 is a transverse verticalsection on the line y y, Fig. 2. Fig. 4 is a plan View of the operatingmechanism for the pan-box shown disconnected from the support for saidbox and illustrating in dotted lines the movements of the parts. Fig. 5is a detail View of one of the pans.

Referring to the drawings, wherein similar numerals of reference areemployed to indicate corresponding parts in the several views, thenumeral 1 designates base-sills having end posts 2, intermediate posts3'and 4; and braces 5, rising vertically therefrom. These posts arearranged in opposite pairs, and the post 4 and the pair of the end posts2 nearest thereto extend above the posts 3 and 2 at the opposite end.Longitudinal strips 6 connect the upper ends of the rear posts, theposts 3, and are also secured to the posts 4, while similar strips 7connect the posts 4 with the front end posts 2. The said posts are alsoconnected by suitable cross-strips in order to form a support for themechanism, which will be hereinafter referredto, and also provide forstrengthening the supporting-frame as an entirety.

A pan-box 8 is employed in connection with the machine and comprises aseries of stepped pans 9, each of which has a rearcurved wall 10, fromwhich the bottom 11 extends up wardly and forwardly in a straight lineand has its free end curled or curved over the adjacent vertical portion12 of the succeeding pan and which continues from the upper terminationof the curved wall 10, and the front end of each pan is made narrowerthan the rear of the next pan, into which it is fitted. All pans arebolted or riveted to the sides of the pan-box. The said pans arepreferably formed of sheet metal-such as sheet-iron, galvanized iron, orcopper-plate, as may be desired-and at the upper end of the pan-box ahopper 13 is'secured, wherein the dirt carrying the ore is shoveled orotherwise delivered.

Rising from the pan-box near the opposite ends thereof and from oppositesides are loopshaped metal straps l i, rigidly secured at their ends tothesides of the box and which extend across said box at a suitabledistance above the upper edge thereof, and extending upwardly from thesaidstraps are hangers 15,movably carrying grooved rollers 16, whichtravel on horizontal metal rods 17,1ongitudinally disposed and supportedcentrally of the width of the frame by adjacent cross-bars thereof, therod at the rear end being in a lower horizontal plane than that at theforward end for giving the desired inclination to the pan-box. By thisarrangement it will be seen 7 that the pan-box is suspended to swingfreely on the rods'17, so as to be permitted to have a longitudinal aswell as a swinging movement within the supportingframe, the parts beingso proportioned and the operating mechanism so'timed as to prevent theopposite sides of the box from 'strik ing the adjacent side posts. p

Extending transversely across the front end posts 2 and at suitableelevation is a shaft 18, which, as shown, is supplied with acrank-handle 19 for the application of manual power; but it will beunderstood that any motive power may be applied to said shaft. The saidshaft is form ed with a central crank 20,:to which is movably andloosely connected the rear end of a pitman 21, which extends forwardlyand has its opposite end attached to oneIarm of angle-plate 22, movablysecured to the said pan-box. The opposite end of the said angle-plate 22has movably connected thereto an inner end of a transverse pitman 23,which extends outwardly through one side of the supporting-frame and isattached to an upper arm 24 of a bell-crank connection 25, comprising abolt or pintle seated in brackets 26 and having on the lower portionthereof, belowthe arm 24, a second arm 27 and at a right angle to theaforesaid arm, and to which a supplemental pitman 28 is attached at itsrear end. The forward end of the said supplemental pitman is secured toone end of an arm 29, mounted on the end of the shaft 18 opposite tothat to which the power is applied. 1

In operation the dirt containing the ore is placed in the hopper 13, andafter a sufiicient quantity has been received by the pan-box the shaft18 is actuated and through the pitman 21 moves and throws the pan-boxfor-,1 wardly and rearwardly in accordance with its stroke. At the sametime the transverse pitman 23 is actuated through the bell-crankconnection 25 by the supplemental pitman 28 to swing the box either toone side or the other in accordance with the movement of the said parts,and it will be seen that as the motion increases the said pan-box is notonly actuated in the two directions, but that by the rapidity of saidmovement, together with the swaying of the pan-box incident to the looseconnection through the medium of the roller 16 on the rods 17, the saidpan-box will have a circular motion and the dirt containing the goldwill be rotated in the several pans. The inclination toward the rear ofeach of said pans produces an action simulating the movement of a commonpan in placer mining, and the step-by-step operation on the dirtcarrying the gold through the series of pans in the pan-box causes atrue and posi-- tive separation of the gold from the dirt, and thetailings that will be delivered from the lower end of the pan-box willhave been entirely relieved of gold before issuing-from said box.

The capacity of the machine may be varied, and other metals may betreated in a similar manner if they admit of such operation.

It is obviously apparent that many minor changes in the details ofconstruction and arrangement of the several parts might be made andsubstituted for those shown and described without in the least departingfrom the nature or spirit of the invention.

Having thus described the invention, what is claimed as new is- 1. In amachine of the character set forth, the combination of asupporting-frame, an inclined pan-box suspended in said frame oncentrally arranged longitudinal rods, and comprising a series of steppedpans, an angleplate attached to the bottom of the pan-box, a crank-shaftat one end of the frame, a longitudinally disposed pitman, a transversepitman attached to the other arm of said angle-plate, a bell-crank leverat one side of the machine having one arm connected with said transversepitman, its other arm being connected with the crank-shaft at the end ofthe frame,whereby said pan is given a rotary swinging motion,substantially as described.

2. In a machine of the character set forth, the combination with thesupporting-frame, of a pan-box mounted in said frame and having, aseries of stepped pans therein, loopshaped straps secured to the ends ofsaid panbox and carrying centrally-located grooved rollers,centrally-arranged longitudinal rods in the upper portion of the frameand on which said rollers move, said rods being arranged in differenthorizontal planes for giving the desired angle of inclination to thepan-box, a crank-shaft at one end of the frame, an angle-plate securedto the bottom of the pan-box, and connections between said angle-plateand crank-shaft for giving both a longitudinal and a lateral swingingmovement to the pan-box, substantially as described.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

WILLIAM A. DARLING.

Witnesses:

S. P. SHUTT,. H. B. HENDRICKS.

